[riot-notifications] [RIOT-OS/RIOT] lwip: add IPv4 support for `netdev_tap` (#14150)

MichelRottleuthner notifications at github.com
Wed May 27 17:06:52 CEST 2020

> Maybe just ifconfig <if_id> up?

Hmm that would be more like telling the network device to go up. But then the indication from the tap device to the lwip netdev instance (i.e. `NETDEV_EVENT_LINK_UP`) would still be missing, or am I misunderstanding something here?
Actually I would have expected that either
1) the tap device guarantees the event is fired automatically somewhere close to its init because other modules need that indication for proper operation (e.g. `lwip_dhcp_auto`)
2) or that modules like `lwip_dhcp_auto` don't strictly require the event to eventually start operation (e.g. actively check if the device is already up).

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